Certified Information Systems Security Professional (CISSP) — Question 89

An information security administrator wishes to block peer-to-peer (P2P) traffic over Hypertext Transfer Protocol (HTTP) tunnels. Which of the following layers of the Open Systems Interconnection (OSI) model requires inspection?

Answer options

• A. Application
• B. Transport
• C. Session
• D. Presentation

Correct answer: A

Explanation

The correct answer is A, Application, because P2P traffic operates at this layer where applications interact, allowing for the analysis and blocking of specific types of traffic. The other layers, such as Transport, Session, and Presentation, do not directly handle the specific application protocols used for P2P traffic.